| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Study guide to accompany Barker The elements of logic | Paperback | 978-0-07-003722-9 (0-07-003722-1) | 1980 |
| Study guide to accompany Barker The elements of logic | 978-0-07-037382-2 (0-07-037382-5) | 1974 |